Help with Quants please

Hello everyone! I'll get straight to the point: Like most of the people, I was told I'm bad at maths quite early in my life. Hence, maths became the subject of terror.

Currently, I'm preparing for Banking exams and while reasoning, surprisingly, has been a breeze, the Quants is an absolute burden on me. I have no clue where to start from. All I want is someone who explains concepts from scratch for these exams and then I can do practice questions and PYQs to get better at it.

My educational background is Humanities. :(